LOINCActive

LOINC Code 11348-0: History of Past illness note

11348-0 is a LOINC code used to identify History of Past illness note in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Past illness note. It is commonly used with the system or sample type ^Patient.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Past illness note. It is commonly used with the system or sample type ^Patient.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • History of Past illness note
  • Past illness note
  • History of past illness describes the history related to their current complaints, problems, or diagnoses.
  • Document; Encounter; Evaluation and management; Evaluation and management note; H+P; H+P.HX; History; Last; notes; P prime; Point in time; Random; Visit note

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

History of Past illness noteHx of Past illness notePast illness noteH&P.HXHxPt^Patient

Frequently asked questions

Code details

Code11348-0
SystemLOINC
Display nameHistory of Past illness note
DescriptionPast illness note
Short nameHx of Past illness note
ComponentPast illness note
PropertyHx
TimingPt
System (specimen)^Patient
ScaleDoc
ClassH&P.HX
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.81

Part names

Past illness noteHxPt^PatientDocHistoryPoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 11348-0 | HealthAssure